Eli Lilly and Company is a leading American pharmaceutical firm, founded in 1876, with a market cap of $842 billion, making it the most valuable drug company as of October 2024. The company specializes in various therapeutic areas, notably insulin and diabetes treatments, oncology, immunology, and neuroscience, and is involved in innovative research such as Alzheimer's disease treatment. A case study highlighted development costs of $1.5 billion and projected revenues of $800 million annually, indicating a profitable investment with a net present value (NPV) of approximately $1.3 billion and an internal rate of return (IRR) exceeding the investment rate.